Languages

Our solutions

Metal O-rings. Extreme conditions.
Metal C-rings. High requirements.
PTFE Seals. Newest generation.

With our experience we can make every required seal for the highest conditions. Contact us for your specific needs.

Contact us for more information

Eurosealings NV
Molenberglei 17
2627 Schelle

tel: 03 844 11 16
fax: 03 844 42 81
info: info@eurosealings.be

Selection criterions for metal O-rings

General
Performances and types
Selection criterions for metal O-rings

Coating and quality of finish

Sealing specification

In order to be able to select the appropriate metal O-ring for a particular application the pressure, the temperature and the kind of the media to be sealed in the system have to be known:

O-ring type
The selection of the correct O-ring type depends on the system pressure:

O-ring type

O-ring material
The selection of the correct O-ring material depends on the used temperature:

O-ring material

Ring diameter and tube wall thickness

The tube profile section is determined by means of the outside diameter of the rings, the desired force of pressure and the available space. The wall thickness thus has to be selected that an adequate force of pressure accrues upon the appropriate deformation. The following data comprehend the common wall thicknesses, which can be applied for each diameter. With electroplated surfaces, seals with a tube wall thickness &Mac179; 3.2 mm diameter and load of approx. 72 N/mm peripheral length lead to a plastic deformation of the electroplating. For tubing with a diameter &Mac178; 3.2 mm a pressing of 140 N/mm peripheral length is required. Teflon*) coatings on rings are plastically deformed with a load of 18 N/mm peripheral length.

Ring diameter and tube wall thickness
(Click for big picture)

Groove dimensions

The correct dimension and quality of finish of the groove are as important as the O-ring itself for the use of the seal. The following recommended groove dimensions for internal and external pressure applications are to be understood as general recommendations for the preparation of sealing faces. The dimensions in the list refer to rings, which are not electroplated. Groove depths for rings with a profile section of 0.9 mm are increased by the double of the coating thickness. Groove depths for electroplated or coated rings with a tube diameter of 1.6 mm or more are not increased.

Groove dimensions
(Click for big picture)